RE: Mystery Truck
It might take some time and effort, but I'm sure you could find the parts you need.
I just like the novelty of the older stuff. None of it is really impressive or even fun to play with when compared to the new stuff, but the old ones are still neat. I found my old buggies at my parents house last week, but the only one complete enough to even bother with is a little Aristo-craft Koala.